installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/w3-total-cache-old-php.php

@@ -0,0 +1,25 @@
+<?php
+
+if ( ! defined( 'ABSPATH' ) ) {
+	die();
+}
+
+function w3tc_old_php_message() {
+	$m = __( 'Please update your PHP. <strong>W3 Total Cache</strong> requires PHP version 5.6 or above', 'w3-total-cache' );
+	return $m;
+}
+
+function w3tc_old_php_activate() {
+	echo esc_html( w3tc_old_php_message() );
+	exit();
+}
+
+function w3tc_old_php_admin_notices() {
+	?>
+	<div class="notice error notice-error">
+		<p><?php echo esc_html( w3tc_old_php_message() ); ?></p>
+	</div>
+	<?php
+}
+
+add_action( 'admin_notices', 'w3tc_old_php_admin_notices' );